Upgrade from scss-lint to sass-lint (Hacker0x01#697)

* Upgrade from scss-lint to sass-lint

sass-lint is pure JS, so this removes the Ruby dependency.

* Also upgrade from grunt-contrib-sass to grunt-sass

grunt-sass uses node-sass, whereas grunt-contrib-sass
still depends on Ruby.

.sass-lint.yml

@@ -0,0 +1,154 @@
+# sass-lint config generated by make-sass-lint-config v0.1.2
+#
+# The following scss-lint Linters are not yet supported by sass-lint:
+# ChainedClasses, DisableLinterReason, ElsePlacement, PropertyCount
+# PseudoElement, SelectorDepth, SpaceAroundOperator, TrailingWhitespace
+# UnnecessaryParentReference, Compass::*
+#
+# The following settings/values are unsupported by sass-lint:
+# Linter HexLength, option "enaled"
+# Linter Indentation, option "allow_non_nested_indentation"
+# Linter Indentation, option "character"
+# Linter SpaceBeforeBrace, option "allow_single_line_padding"
+
+files:
+  include: '**/*.scss'
+options:
+  formatter: stylish
+  merge-default-rules: false
+rules:
+  bem-depth:
+    - 0
+    - max-depth: 1
+  border-zero: 0
+  brace-style: 1
+  class-name-format:
+    - 1
+    - convention: hyphenatedbem
+  clean-import-paths:
+    - 1
+    - filename-extension: false
+      leading-underscore: false
+  empty-line-between-blocks:
+    - 1
+    - ignore-single-line-rulesets: true
+  extends-before-declarations: 1
+  extends-before-mixins: 1
+  final-newline:
+    - 1
+    - include: true
+  force-attribute-nesting: 1
+  force-element-nesting: 1
+  force-pseudo-nesting: 1
+  function-name-format:
+    - 0
+    - convention: BEM
+  hex-length:
+    - 1
+    - style: short
+  hex-notation:
+    - 1
+    - style: lowercase
+  id-name-format:
+    - 1
+    - convention: hyphenatedbem
+  indentation:
+    - 1
+    - size: 2
+  leading-zero:
+    - 1
+    - include: false
+  mixin-name-format:
+    - 0
+    - convention: BEM
+  mixins-before-declarations: 1
+  nesting-depth:
+    - 1
+    - max-depth: 4
+  no-color-keywords: 1
+  no-color-literals: 0
+  no-css-comments: 0
+  no-debug: 1
+  no-duplicate-properties: 1
+  no-empty-rulesets: 1
+  no-extends: 0
+  no-ids: 1
+  no-important: 1
+  no-invalid-hex: 1
+  no-mergeable-selectors: 1
+  no-misspelled-properties: 1
+  no-qualifying-elements:
+    - 1
+    - allow-element-with-attribute: false
+      allow-element-with-class: false
+      allow-element-with-id: false
+  no-trailing-zero: 1
+  no-transition-all: 0
+  no-url-protocols: 1
+  no-vendor-prefixes: 0
+  placeholder-in-extend: 1
+  placeholder-name-format:
+    - 1
+    - convention: hyphenatedbem
+  property-sort-order: 0
+  property-units:
+    - 1
+    - global:
+        - ch
+        - em
+        - ex
+        - rem
+        - cm
+        - in
+        - mm
+        - pc
+        - pt
+        - px
+        - q
+        - vh
+        - vw
+        - vmin
+        - vmax
+        - deg
+        - grad
+        - rad
+        - turn
+        - ms
+        - s
+        - Hz
+        - kHz
+        - dpi
+        - dpcm
+        - dppx
+        - '%'
+  quotes:
+    - 1
+    - style: double
+  shorthand-values: 1
+  single-line-per-selector: 1
+  space-after-bang:
+    - 1
+    - include: false
+  space-after-colon:
+    - 1
+    - include: true
+  space-after-comma:
+    - 1
+    - include: true
+  space-before-bang:
+    - 1
+    - include: true
+  space-before-brace:
+    - 1
+    - include: true
+  space-before-colon: 1
+  space-between-parens:
+    - 1
+    - include: false
+  trailing-semicolon: 1
+  url-quotes: 1
+  variable-for-property: 0
+  variable-name-format:
+    - 0
+    - convention: BEM
+  zero-unit: 1

.travis.yml

@@ -11,9 +11,7 @@ addons:
     packages:
       - g++-4.8
 before_install:
-  - rvm install 2.3.1
   - npm install -g grunt-cli
-  - gem update --system && gem install scss_lint -v 0.50.2
   - export DISPLAY=:99.0
   - sh -e /etc/init.d/xvfb start
 script: